The Cho must go on! Filmed during a November 2001 gig at Seattle's Paramount Theater, the second Margaret Cho concert film should please fans of the fearless, ribald Korean-American comedian. As in her first performance documentary (1999's "I'm the One That I Want"), she leans on a lot of ethnic material, recapitulating a heavily-accented impression of her mother. And there's a lot of time spent dealing with all manner of sexuality, as she plays to the sizable gay and lesbian contingent in the audience. (Cho makes no secret of her bisexual experiences.) For those on the fence, her raunchiness may offend. If you're less squeamish, she may win you over with insightful, extremely funny bits on oral sex and the S&M scene. Anyone unfamiliar with Cho can get a healthy dose of her honesty and clever banter from "The Notorious C.H.O." She came to national attention as the star of a short-lived ABC-TV sitcom, "All-American Girl." That was a watered-down drink; this is pure Cho, no chaser.